This work presents a comparative study of the effectiveness of various conductive additives in cathode electrodes of lithium-ion batteries based on the commercial LiNi0.5Co0.2Mn0.3O2 (NCM523) material. The following conductive components were studied: Super P carbon black, polymer PEDOT:PSS and carbon nanotubes (CNTs). The study involved the evaluation of electrode morphology, charge-discharge characteristics, cyclic stability, impedance spectroscopy and cyclic voltammetry. Analysis of the obtained results revealed that the CNT additives provide the best electrochemical parameters, including minimal polarization, high specific capacitance and stability at high currents. PEDOT:PSS additive demonstrated characteristics that are potentially promising for application in high-power lithium-ion batteries, but the sample preparation process requires optimization of the synthesis conditions.